2018-07-02_PERMIT FILE - C2010089A ‎(15)‎

• Permit No: C2010089A
• IBM Index Class Name: Permit File
• Doc Date: 7/2/2018
• Doc Name: Pond NHN-002 As-Built
• Section_Exhibit Name: Appendix 2.05.3‎(4)‎-10
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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Structure Detail;
Structure #1 (Culvert
Pit Pumping
Culvert Inputs:
Max. Entrance
Length (ft) Slope (%) Manning's n Headwater Tailwater (ft) Loss Coef.
(ft) (Ke)
1,000.00 2.00 0.0140 1.00 0.00 0.90
Culvert Results:
Structure #2 (Pond
Pond NHN--002
Pond Inputs:
Design Discharge = 2.00 cfs
Minimum pipe diameter: 1 - 12 inch pipe(s) required
Initial Pool Elev:
5,678.25 ft
Initial Pool:
5.17 ac -ft
*Sediment Storage:
1.76 ac -ft
Dead Space:
20.00%
*Sediment capacity based on A verage Annual R of 27.0 for 3 year(s)
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
5,683.00 30.00 3.60:1 3.20:1 8.10
Enhanced Perf. Riser
Riser
Riser Height
Diameter (in)
Barrel
Barrel Length Barrel Slope
Diameter (in)
Number of
Spillway Elev
Mannings n Holes per
(ft)
(ft) (%)
(ft)
Elev
18.00 3.90
18.00 40.00 1.00
0.0150 5,681.90 2
Pond Results:
Peak Elevation:
5,679.60 ft
H'graph Detention Time:
10.74 hrs
Pond Model:
CSTRS
Dewater Time:
3.04 days
Trap Efficiency:
88.24
0
Filename: Pond NHN-002 AS -BUILT 10YR EVENT_05.10.18.sc4 Printed 05-14-2018
Appendix 2.05.3(4)-]0 Page 10 March 2018 JR -16)